2Prior to October 1, 2010 the MFS California Municipal Fund was known as the MFS California Insured Municipal Fund.

The Funds are closed-end Funds. Common shares of the Funds are only available for purchase/sale on the NYSE at the current market price(NYSE-MKT for MFS California Municipal Fund). Shares of the Funds are not FDIC-insured and are not deposits or other obligations of, or guaranteed by, any bank. Shares of the Funds involve investment risk, including possible loss of principal. For more complete information about each Fund, including risks, charges, and expenses, please see the Fund's annual and semi annual shareholder report or contact your financial adviser.